. The science and practice of dental surgery. on with thiscommon condition. Four main types have been observed :Fibroid, Atrophic, Fatty, and Hyaline or Colloid. The Degenerations 1. Fibroid Degeneration or Sclerosis.—Thisprobably occurs, in the first place, as a complica-tion of thrombosis of the capillaries and veins,and permanent dilatation of the arteries throughatony (due to impairment of the vaso-motormechanism) or disease of the walls, with orwithout minute haemorrhages. It seems oftento be succeeded or accompanied by a con-densation or fibrification of the pulp-tissuethat lies between
. The science and practice of dental surgery. on with thiscommon condition. Four main types have been observed :Fibroid, Atrophic, Fatty, and Hyaline or Colloid. The Degenerations 1. Fibroid Degeneration or Sclerosis.—Thisprobably occurs, in the first place, as a complica-tion of thrombosis of the capillaries and veins,and permanent dilatation of the arteries throughatony (due to impairment of the vaso-motormechanism) or disease of the walls, with orwithout minute haemorrhages. It seems oftento be succeeded or accompanied by a con-densation or fibrification of the pulp-tissuethat lies between the basal layer of Weil andthe substance of the pulp proper. A hyper-plasia of the connective tissue fibres of the partsoccurs. Sheaving of the odontoblasts, withor without fatty degeneration, permanent dis-tension of the arteries and arterioles, and rapidovergro\\th of the fibrous tissue, supervene,until a well-marked reticular atrophy appears,and, m later stages, complete fibrosis of theorgan, \\ ith disappearance of all cells and nuclei. Fio. 407.—Longitudinal section of fibroid degeneration of the pulp. D, Dentine; P, Pulp. X 45. and every vestige of nerve bundle and vascularsystem. The condition may be considered to be anatural old-age termination of the life of ahealthy pulp, dependent not upon the age of its possessor, but on the constitutional lesionsalready noted. In complete fibrosis no tracesof cellular organization of cell nuclei, or inter-stitial cementing substance, can be found any-where. Nerve fasciculi, odontoblasts, pulp
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectdentistry, bookyear19
